Narrative:

During climb out of dfw airport, left automatic ignition light came on, followed by left torque fluctuations and torque would drop to zero. This occurred 3 times in a row, then torque gauge dropped to zero. All other engine indication were normal. Called maintenance control (moc) and they advised us to return to dfw. On 2-3 mi final, left engine quit. We declare an emergency, followed memory items and checklist procedures and landed without further incident. Fire rescue looked over aircraft and said it was safe to taxi and we were escorted to the ramp. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was a saab 340B and the cause of the engine failure was the failure of the 7TH stage compressor. The reporter said the engine was replaced.

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Original NASA ASRS Text

Title: A SAAB 340 ON CLBOUT OF DFW DECLARED AN EMER AND DIVERTED DUE TO L ENG LOSS OF PWR CAUSED BY THE 7TH STAGE COMPRESSOR FAILURE.

Narrative: DURING CLBOUT OF DFW ARPT, L AUTO IGNITION LIGHT CAME ON, FOLLOWED BY L TORQUE FLUCTUATIONS AND TORQUE WOULD DROP TO ZERO. THIS OCCURRED 3 TIMES IN A ROW, THEN TORQUE GAUGE DROPPED TO ZERO. ALL OTHER ENG INDICATION WERE NORMAL. CALLED MAINT CTL (MOC) AND THEY ADVISED US TO RETURN TO DFW. ON 2-3 MI FINAL, L ENG QUIT. WE DECLARE AN EMER, FOLLOWED MEMORY ITEMS AND CHKLIST PROCS AND LANDED WITHOUT FURTHER INCIDENT. FIRE RESCUE LOOKED OVER ACFT AND SAID IT WAS SAFE TO TAXI AND WE WERE ESCORTED TO THE RAMP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS A SAAB 340B AND THE CAUSE OF THE ENG FAILURE WAS THE FAILURE OF THE 7TH STAGE COMPRESSOR. THE RPTR SAID THE ENG WAS REPLACED.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.